屋顶之下的半圆柱体也做了相同角度的倾斜，在圆柱中心的上方设置了天窗，通过光线的位置可以知道时间。
Under the roof we put the half cylinder inclined at the same angle and above the center of the cylinder, the top light is set where the time can be told through the position of the line.
它包括一个宽度与高度相等的巨大圆柱体，上面覆盖着半圆形的屋顶。
It consists of a huge cylindrical body of equal height and width, covered by a great hemispherical dome.
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